$(document).ready(function(){
	/**主菜单鼠标移上时背景颜色加深**/
	$(".nav-ul a").mouseover(function(){
		$(this).css("background-color","rgba(0,0,0,.5)");
	});
	$(".nav-ul a").mouseout(function(){
		$(this).css("background-color","#efefef");
	});
});